<template>
  <div>
    <!-- Header 区域 -->
    <van-nav-bar fixed title="文章详情" left-arrow @click-left="$router.back()" />

    <!-- 文章信息区域 -->
    <div class="article-container" v-if="!loading">
      <!-- 文章标题 -->
      <h1 class="art-title">{{artObj.title}}</h1>

      <!-- 用户信息 -->
      <van-cell center :title="artObj.aut_name" :label="formatTimeFn(artObj.pubdate)">
        <template #icon>
          <img :src="artObj.aut_photo" alt="avatar" class="avatar">
        </template>
        <template #default>
          <div>
            <van-button
            type="info"
            size="mini"
            v-if="artObj.is_followed"
            @click="followOrunFollowFn(true)"
            >已关注</van-button>
            <van-button
            icon="plus"
            type="info"
            size="mini"
            plain
            v-else
            @click="followOrunFollowFn(false)"
            >关注</van-button>
          </div>
        </template>
      </van-cell>

      <!-- 分割线 -->
      <van-divider></van-divider>

      <!-- 文章内容 -->
      <div class="art-content" v-html="artObj.content"></div>

      <!-- 分割线 -->
      <van-divider>End</van-divider>

      <!-- 点赞 -->
      <div class="like-box" id="like-box">
        <van-button
        icon="good-job"
        type="danger"
        size="small"
        v-if="artObj.attitude===1"
        @click="likeOrDislikeFn(1)"
        >已点赞</van-button>
        <van-button
        icon="good-job-o"
        type="danger"
        plain size="small"
        v-else
        @click="likeOrDislikeFn(-1)">点赞</van-button>
      </div>
      <!-- 评论 -->
      <Comment
      v-if="artObj.art_id"
      :artObj='artObj'
      />
    </div>
  </div>
</template>

<script>
import {
  getAticleDetailAPI, followAutAPI,
  unFollowAutAPI, likeArtAPI,
  disLikeArtAPI
} from '@/api/article'
import { Toast } from 'vant'
import Comment from './comment.vue'
export default {
  name: 'ArticleDetail',
  components: {
    Comment
  },
  data () {
    this.toast = Toast.loading({
      message: '加载中。。。'
      // duration: 0
    })
    return {
      loading: true, // 详情页数据加载中状态 true表示加载中
      artObj: {}
    }
  },
  // activated()生命周期函数，搭配<keep-alive></keep-alive>用，每次页面激活的时候，触发
  async activated () {
    const res = await getAticleDetailAPI({
      artId: this.$route.query.art_id
    })
    // 加载完成了，手动改成false
    this.loading = false
    if (!this.toast) {
      this.toast.clear()
    }
    this.artObj = res.data
    // console.log(res)
  },
  methods: {
    // 关注和取关
    async followOrunFollowFn (isFollowed) {
      // 关注状态取反
      this.artObj.is_followed = !this.artObj.is_followed
      try {
        // 同步到后台
        isFollowed ? await unFollowAutAPI({
          autId: this.artObj.aut_id
        }) : await followAutAPI({
          autId: this.artObj.aut_id
        })
        Toast.success(isFollowed ? '取关成功' : '关注成功')
      } catch (e) {
        Toast.fail(isFollowed ? '取关成功' : '关注成功')
      }
    },
    // 喜欢和不喜欢
    async likeOrDislikeFn (attitude) {
      // 1.点赞状态取反
      this.artObj.attitude = this.artObj.attitude === 1 ? -1 : 1
      // 2.同步到后台
      try {
        attitude === 1 ? await disLikeArtAPI({
          artId: this.artObj.art_id
        }) : await likeArtAPI({
          artId: this.artObj.art_id
        })
        Toast.success(attitude === 1 ? '取消点赞成功' : '点赞成功')
      } catch (e) {
        Toast.fail(attitude === 1 ? '取消点赞成功' : '点赞成功')
      }
    }
  }

}
</script>

<style scoped lang="less">
.article-container {
  padding: 10px;
  margin-top: 46px;
}
.art-title {
  font-size: 16px;
  font-weight: bold;
  margin: 10px 0;
}

.art-content {
  font-size: 12px;
  line-height: 24px;
  width: 100%;
  overflow-x: scroll;
  word-break: break-all;
    /deep/ img{
    width: 100%;
    }
    /deep/ pre {
        white-space: pre-wrap;
        word-wrap: break-word;
    }
}

.van-cell {
  padding: 5px 0;
  &::after {
    display: none;
  }
}

.avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: #f8f8f8;
  margin-right: 5px;
  border: none;
}

.like-box {
  display: flex;
  justify-content: center;
}
</style>
